Display screen or a portion thereof with graphical user interface



FIG. 1 is a front view of a first embodiment of the display screen or a portion thereof with graphical user interface, showing our new design; and,

FIG. 2 is a front view of a second embodiment of the display screen or a portion thereof with graphical user interface.

In the reproduction, the broken lines forms a part of the claim. The outermost solid line represents the display screen and forms a portion of the claim. 

CLAIM The ornamental design for a display screen or a portion thereof with graphical user interface, as shown and described. 